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  • HDMI Receiver compliant with HDMI 1.4 specification

  • Support CVBS and S-Video output in format of NTSC or PAL

  • On-chip Audio encoder which support 2 channel IIS/S/PDIF audio output

  • MCU embedded to handle the control logic

  • Support device boot up by automatically loading firmware from on-chip flash

  • Integrated EDID Buffer

  • TV connection detection supported

  • HDMI input detection supported

  • Scaler engine integrated for 640x480 safe mode input supported

  • Support Auto Power Saving mode and low stand-by current

  • Support RGB to YCC conversion in ITU-R BT.601 and 709 color space

  • IIC slave interface and HDMI DDC interface are available for debug and firmware update.

  • Low power architecture

  • RoHS compliant and Halogen free package

  • Offered in 40-Pin QFN package (5 x 5 mm)


Chrontel’s CH7108B is a low-cost, low-power semiconductor device that consists of HDMI receiver, three separate 9-bit video Digital-to-Analog Converters (DACs), SDTV encoder and audio encoder, which can convert HDMI signals into SDTV outputs with IIS or SPDIF audio output.

The HDMI Receiver integrated is compliant with HDMI 1.4b. With sophisticated MCU and the on-chip flash, CH7108B supports auto-boot and EDID buffer. Leveraging the firmware auto loaded from the embedded flash, CH7108B can support HDMI input detection, DAC connection detection and determine to enter into Power saving mode automatically.

Structure diagram

Application Desc

  Refer to the AN-B037 for industrial products in detail  

  Refer to the AN-B033

Technical Report



Input Interface HDMI, DVI

Output Interface  CVBS , S-Video

Audio Interface IIS, SPDIF Output

Other features   No

Package Type   QFN40


Part Number Package Type Operating Temperature RangeMinimum Order Quantity

CH7108B-BF  40 QFN, Lead-freeCommercial : 0 to 70°C490/Tray

CH7108B-BFI  40 QFN, Lead-freeIndustrial : -40 to 85°C490/Tray




About Chrontel Overview Chrontel, headquartered in San Jose, California, is a privately-held company with over 130 employees worldwide. Incorporated in 1986, the company develops and markets mixed-signal integrated circuits for the PC, display and consumer mark...


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